Rolls DB24 Stereo DI Manual & Schematic 电路图.pdf

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1、Quick Start Guide Rolls Corporation Salt Lake City, UT 07/10 DB24 Stereo Direct Interface - Two channel, transformer isolation device - Passive - no power required - Stereo RCA, 1/8 (3.5mm), and dual 1/4 Inputs - Balanced XLR Outputs - Individual variable attenuators The DB24 is an ideal impedance m

2、atching device for connecting any unbalanced stereo signal to a balanced system. Consumer audio equip- ment such as CD players, DVD players, MP3 players, etc., may be easily connected to a professional audio system. DB24 Stereo Direct Interface SPECIFICATIONS Input Impedance : 20k - 600 Ohms Frequen

3、cy Response: 50 - 15kHz +/- 3 dB Output Impedance: 600 Ohms Max Output Level: +4 dBm Connectors: 2 ea; XLR Male, 1; Stereo RCA, 1; 1/8 (3.5mm) TRS, 2 ea; 1/4 TRS Controls: 2 ea; Variable attenuators, 2 ea; Ground Lift switches Weight: 1.5 lbs. Dimensions: 3.42 w x 1.45 h x 3.325 d L. Ster R. Mon Lef

4、t Level Right Level R L St. IN LEFT OUT RIGHT OUT MADE IN USA DB24 Stereo Direct Interface LEFT STEREO INPUT RIGHT MONO INPUT STEREO INPUT LEFT LEVEL RIGHT LEVEL STEREO RCA INPUT gnd lift DB24 -60 -20 -35 -50 -25 -60 -20 -35 -50 -25 mono stereo RadioFans.CN 收音机爱 好者资料库 INTRODUCTION Thank you for purc

5、hasing the DB24 Stereo Direct Interface. This sturdy device is designed and manufactured to the most demanding specifi cations in order to provide years of faithful survice. The DB24 converts high impedance audio signals to low impedance via Rolls proprietary audio transformers, and a variety of inp

6、uts. DESCRIPTION FRONT PANEL L. Ster R. Mon Left Level Right Level St. IN DB24 -60 -20 -35 -50 -25 -60 -20 -35 -50 -25 - L.Ster: 1/4 Tip-Ring-Sleeve jack for connection to a Left portion of a signal, or a Tip-Ring-Sleeve Stereo signal. - Left Level: Adjusts the input level to the Left channel. - L &

7、 R: Stereo RCA jacks, for connection to an unbalanced stereo signal. Note: The Right and Left jacks may be used individually as well. NOTE: The Red RCA jack connects to the Right Out, and the White RCA jack connects to the Left Out. - St. IN: 1/8 (3.5mm) Tip-Ring-Sleeve jack for connection to an unb

8、alanced Stereo signal only. - Right Level: Adjusts the input level to the Right channel. - R. Mon: 1/4 Tip Sleeve jack for connection to the Right portion of a stereo signal, or to a Mono signal. REAR PANEL LEFT OUT RIGHT OUT gnd lift mono stereo - - Stereo/Mono When in stereo the units left and rig

9、ht are separet. When in Mono The left and right inputs are combined together. In mono mode you can plug a single left or right input into the DB24 and you will get output from both left and right. - Ground Lift (Labeled gnd/lift): When positioned to the side of the switch labeled lift, the shield of

10、 the XLR plug is separated from the ground pin (pin 1). - Left/Right OUT: Balanced XLR jacks - for connection to mixer inputs, amplifi ers, etc. This will effect both left and right channels. SCHEMATIC CONNECTION / OPERATION 1/4 Jacks: Stereo Operation: A. Individual Right and Left connections - Con

11、nect Tip-Sleeve 1/4 plugs to the Right and Left Input jacks. B. Stereo Tip-Ring-Sleeve connection - Connect a Tip-Ring-Sleeve 1/4 plug to the Left/Stereo Input jack. IMPORTANT NOTE: Connecting a Tip-Sleeve MONO plug into this jack, with nothing connected to the Right/Mono Input will result in the Ri

12、ght/Mono Input being shorted to ground. 1/4 Jack: Mono Operation: Connect a Tip-Sleeve Mono plug to the Right/Mono Input. 1/8 (3.5mm) Jack: Connect a Tip-Ring-Sleeve stereo plug into this jack for stereo operation only. NOTE: Connecting a Tip-Sleeve MONO plug into this jack, with nothing connected t

13、o the Right/Mono 1/4 Input will result in the Right/Mono Input being shorted to ground. RCA Jacks: Connect Stereo RCA plugs into these jacks for stereo or dual-mono operation. Connect XLR outputs to the next device in your signal chain. Adjust the Right and Left Level controls for an appropriate inp

14、ut level. For ex- ample, for maximum amount of attenuation (least amount of signal), turn the Level control to -60. For minimum attenuation (maximum signal), turn the Level control up to -20. 1 Rolls Corporation 5968 So 350 West MurrayUtah 84107 1 DB24.SCHA 25 JUNE 2010 Document Number: Date: Rev: S

15、heetof DB24 STEREO DIRECT INTERFACE Ba INPUTS OUTPUT R4 10K R1 10K 12 3 J2 XLR JACK M TR2 PN829 2 3 1 J4A RCAX2 PC P1 P100K P2 P100K 12 3 J1 XLR JACK M TR1 PN829 R2 1K R3 1K J3 PHONE 1/4 J6 PHONE 1/4 3 1 2 SW1 SPST 3 1 2 SW2 SPST LEFT/STEREO 20K X 600 ohm RIGHT/MONO MONO/STEREO J5 JK3.5ST R6 470 R5470 GROUND/LIFT RadioFans.CN 收音机爱 好者资料库